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首页> 外文期刊>Journal of Fish Biology >Contemporary factors influencing genetic diversity in the Alaska humpback whitefish Coregonus clupeaformis complex
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Contemporary factors influencing genetic diversity in the Alaska humpback whitefish Coregonus clupeaformis complex

机译：影响阿拉斯加遗传多样性的当代因素驼背白鲑鱼Clupeaformis复合物

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摘要

Thirteen microsatellite loci were used to address three hypotheses regarding genetic diversity in the humpback whitefish Coregonus clupeaformis complex in Alaska. The test results provided further insight into the factors influencing C. clupeaformis complex population structure and level of genetic variation. First, the microsatellite data did not provide evidence of two spatially distinct Beringian and Eurasian refugial groups as revealed in previous phylogeographic analyses of mitochondrial DNA variation. Rather, the population structure inferred from the microsatellite variation appears to reveal the influence of factors on a more recent time scale, including gene flow among the refugial groups and isolation of some anadromous and freshwater resident populations. Second, anadromous C. clupeaformis complex collections exhibited higher intra-population genetic diversity than freshwater resident collections. This outcome is consistent with previous meta analyses suggesting that freshwater resident populations probably have smaller historical effective population sizes and less conspecific gene flow because the habitat tends to be smaller and supports fewer and smaller populations. Finally, the analysis of contemporary immigration rates was consistent with, but did not provide statistical support for, the hypothesis that gene flow among anadromous C. clupeaformis complex populations along coastal Alaska is influenced by the Alaska Coastal Current. Further studies are needed to evaluate gene flow among coastal Alaska C. clupeaformis complex populations.
机译：13个微卫星位点被用来解决三个关于阿拉斯加座头白鱼群遗传多样性的假设。试验结果进一步揭示了影响棒形隐孢子虫复杂种群结构和遗传变异水平的因素。首先，微卫星数据没有提供证据表明，在以前的线粒体DNA变异的系统地理学分析中，存在两个在空间上截然不同的白令阶和欧亚阶避难所群。相反，从微卫星变异推断的种群结构似乎揭示了最近时间尺度上的因素的影响，包括避难群体之间的基因流动以及一些溯河产卵和淡水居民种群的隔离。第二，溯河产卵的C.clupeaformis复合群比淡水居民群表现出更高的群体内遗传多样性。这一结果与之前的荟萃分析一致，该分析表明，淡水居民群体可能具有较小的历史有效群体规模和较少的同种基因流，因为栖息地往往较小，支持的群体越来越少。最后，对当代移民率的分析与阿拉斯加沿岸溯河产卵群C.clupeaformis复杂种群之间的基因流动受阿拉斯加沿岸洋流影响的假设一致，但没有提供统计支持。需要进一步的研究来评估阿拉斯加海岸C.clupeaformis复杂种群之间的基因流动。

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  • 来源
    《Journal of Fish Biology》 |2018年第4期|共17页
  • 作者

    Olsen J. B.; Brown R. J.; Russ O. L.; Harper K.; Wenburg J. K.;

  • 作者单位

    US Fish &

    Wildlife Serv Conservat Genet Lab 1011 East Tudor Rd Anchorage AK 99503 USA;

    US Fish &

    Wildlife Serv Fairbanks Fish &

    Wildlife Field Off 101 12th Ave Room 222 Fairbanks AK 99701 USA;

    US Fish &

    Wildlife Serv Conservat Genet Lab 1011 East Tudor Rd Anchorage AK 99503 USA;

    US Fish &

    Wildlife Serv Kenai Fish &

    Wildlife Field Off POB 1670 Kenai AK 99611 USA;

    US Fish &

    Wildlife Serv Conservat Genet Lab 1011 East Tudor Rd Anchorage AK 99503 USA;

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  • 原文格式 PDF
  • 正文语种 eng
  • 中图分类 鱼纲;
  • 关键词

    Alaska; Coregonidae; genetic diversity; humpback whitefish;

    机译：阿拉斯加;Coregonidae;遗传多样性;驼背白鲑;

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